Orange-yellow vat dye.



h'BTHUR LUTTRINGHAUS AND HEINRICH VON DIESIBAGH, OF MANNHEIM, GEANY, ASSIG-NUES T BADISCHE ANILIN do SODA FABRIK, OE LUDWIGEHAFEN-ON-THE- ENE, GERMANY, A CORPORATION OF GERMANY.

OEA'NGE-YELLGW VAT DYE.

tion, assumingthe chlorinated compound to be shown, corresponding to the formula co W We can prepare our new coloring matter by fir'sttreating 1-chloranthraquinone-2-carboxylic acid with 3.a-dichlor-thiophenol and then treating the product with a condensing agent such, or instance, as concentrated sulfuric acid, until a thioxanthone ring is formed.

Our new coloring. matter consists, when dry, of anorange-yellow powder and, in the pure state, has a percentage composition corresponding tothe above formula. It yields a carmine red solution in concentrated sulfuric acid, a violet vat in alkaline hydrosulfite solution, and dyes cotton from. this vat orange-yellow shades of excellent fastness against the action of chlorin and light.

In this invention, bromin is equivalent to chlorin.

' The following example will serve to illustrate further the nature of our invention, 45 which, however, is not confined to this example. The parts are by weight. Boil to gether, for about 3 hours, in a reflux apparatus from which air is excluded, 120 parts of l-chlor-anthraquinone-Q-carboxylic acid, 70 parts of 3.4-dichlonthiophenol, 45 parts of caustic potash, and 1,000 parts of water. Then dilute with 1,000 parts of hot water, filter, and acidity the filtrate with dilute acetic acid. Filter off the dichlor-phenylto thio-1anthraquinone-9-carboxylic' acid and Specification of Letters Patent.

Application filed November 3, 1911.

wash and dry it. The acid thus obtained is orange-yellow and yields a reddish yellow solution in alkali and a violet solution in cold concentrated sulfuric acid. which latter solution, however, rapidly turns reddish brown. Heat 10 paints of'the prodhct thus obtained with 100 parts of concentrated sulfuric acid, on the water-bath, until a test portion, on being treated with excess of caustic soda, is pure yellow. Then pour the reaction mixture into water, filter oil the coloring matter, wash it with water and extract it with boiling dilute sodium carhonate solution.

vat and dyes cotton fast orange-yellow. The 3.4-dichlor-thiophenol employed in this example can be obtained by treating orthodichlorhenzene with chlorsulfonic acid and reducing the product with zinc dust.

hl ow what we claim is 1. The vat coloring matter which pea sesses a percentage composition corresponding to the formula where Hal means haiogen which coloring matter consists, when dry, of an orange-yellow powder, which yields a car-mine red solution in concentrated sulfuric acid, a violet vat in alkaline hydrosuli'ite solution, and which dyes cotton from this vat orange-yellow shades of excellent fastness against the action of chlorin and light. 7

2. The vat coloring matter which possesses a percentage composition corresponding to the formula It then consists 0% an orangeyellow powder which yields a violet are which coloring matter consists, when dry, of ln testimony whereof we have hereunto an orange-yellow powder, WhICh y elds a setour hands in the presence of two sub- 1 carlnlne red solution in concentrated sulscribing witnesses.

furic acid, a violet vat in alkaline-hydrosul- ARTHUR LUTTRINGHAUS.

fite solution, and which dyes cotton from HEINRICH VON DIESBACH. this Vat orange-yellow shades of excellent WVitnesses:

fastness against the action of chlorin and J. ALEC. LLOYD,

light. J QSEPH PEIFFER. 

